Hanna Instruments HI3512 Instruction Manual
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Hanna Instruments HI3512 Instruction Manual

Hanna Instruments HI3512 Instruction Manual

Two channels ph / orp / ise ec / resistivity /tds /nacl / temperature bench meter
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INSTRUCTION MANUAL
HI3512
Two Channels
pH / ORP / ISE
EC / Resistivity /TDS /NaCl / Temperature
Bench Meter
Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895 USA
www.hannainst.com

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  • Page 1 INSTRUCTION MANUAL HI3512 Two Channels pH / ORP / ISE EC / Resistivity /TDS /NaCl / Temperature Bench Meter Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895 USA www.hannainst.com...
  • Page 2 All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA. Hanna Instruments reserves the right to modify the design, construction, or appearance of its products without advance notice.

  • Page 3: Table Of Contents

    Table of Contents TABLE OF CONTENTS 1. Preliminary Examination .......4 14.2. Two‑Point Calibration ........27 14.3. Error Screens ..........28 2. General Description ........4 14.4. Clear Calibration .........28 3. Functional Description ........6 14.5. NaCl Calibration .........29 4. Specifications ..........7 15. Good Laboratory Practice (GLP) ....30 5.

  • Page 4: Preliminary Examination

    1. PRELIMINARY EXAMINATION Remove the instrument and accessories from the packaging and examine it carefully. ® For further assistance, please contact your local Hanna Instruments office or email us at tech@hannainst.com. Each unit is supplied with: • 12 Vdc power adapter •...
  • Page 5 General Description Other features • Log on demand up to 400 samples • Log interval with log on stability feature up to 600 records • Auto Hold feature, to freeze first stable reading on the LCD • GLP, last calibration data for pH, Rel mV, ISE, EC, or NaCl •...

  • Page 6: Functional Description

    Functional Description 3. FUNCTIONAL DESCRIPTION HI3512 pH/ORP/ISE & E esistivity/TDS/NaCl HELP CHANNEL MENU RANGE 1. Liquid Crystal Display (LCD) 2. Virtual keys (perform action displayed above on the LCD) 3. ESC key, exit function 4. CHANNEL key, toggle pH (Ch.1) and EC (Ch. 2) forward / backward navigation &...

  • Page 7: Specifications

    7  Specifications 4. SPECIFICATIONS –2.0 to 20.0 pH Range –2.00 to 20.00 pH –2.000 to 20.000 pH 0.1 pH Resolution 0.01 pH 0.001 pH ±0.01 pH Accuracy ±0.002 pH Range ±2000.0 mV Resolution 0.1 mV Accuracy ±0.2 mV Range 1.00 E‑7 to 9.99 E10 conc. Resolution 3 digits 0.01, 0.1, 1, 10 conc.
  • Page 8 Specifications  0 to 400 mS/cm (shows values up to 1000 mS/cm) Actual conductivity 1000 mS/cm 0.001 to 9.999 µS/cm 10.00 to 99.99 µS/cm Range 100.0 to 999.9 µS/cm 1.000 to 9.999 mS/cm 10.00 to 99.99 mS/cm 100.0 to 999.9 mS/cm 1000 mS/cm (autoranging) 0.001 µS/cm...
  • Page 9 9  Specifications 0.000 to 9.999 ppm 10.00 to 99.99 ppm 100.0 to 999.9 ppm Range 1.000 to 9.999 g/L 10.00 to 99.99 g/L 100.0 to 400.0 g/L (autoranging) 0.001 ppm, 0.01 ppm, 0.1 ppm Resolution 0.001 g/L, 0.01 g/L, 0.1 g/L ±1% of reading (±0.05 ppm or 1 digit whichever greater) Accuracy excluding probe error...

  • Page 10: Operational Guide

    Operational Guide 5. OPERATIONAL GUIDE 5.1. POWER CONNECTION Plug the 12 Vdc adapter into the power supply socket. Note: have a fuse protected main line. 5.2. ELECTRODE AND PROBE CONNECTIONS For pH, ORP or ISE measurements connect a combination pH/ORP/ISE electrode to the BNC connector located on the rear panel of the instrument.

  • Page 11: Orp Measurements

    Operational Guide • Temperature compensation mode (MTC ‑ manual, ATC ‑ automatic). While in MTC mode the indicate that the temperature can be manually changed using ARROW keys. • Electrode condition during the calibration day. • The buffers used in last pH calibration (if feature is enabled in SETUP). •...

  • Page 12: Relative Mv Measurements

    Operational Guide 5.6. RELATIVE mV MEASUREMENTS Use Rel mV key from mV measurement mode. The relative mV reading is displayed along with the Absolute mV value and the current temperature readings. The relative mV reading is equal to the difference between the absolute mV input value and relative mV offset established in the relative mV calibration.

  • Page 13: Auto-Ranging Ec Channel

    Auto-Ranging EC Channel Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. Press CHANNEL to select EC channel or/and press RANGE to select range (EC, Resistivity, TDS, Salt). If needed, select the “Automatic” or “No TC” compensation mode to perform temperature measurements (see SETUP for details).

  • Page 14: Temperature Compensation Ec Channel

    Temperature Compensation EC Channel The auto‑ranging mode is also disabled by selecting a “fixed range” in the SETUP menu. While in fixed range mode the instrument will display the readings with the fixed resolution. Maximum 6 digits can be displayed. The top of the fixed range is displayed blinking when the reading exceeds this value.

  • Page 15: Conductivity Versus Temperature Chart

    The dependency of conductivity on temperature is expressed as a relative change per Celsius degree at a particular temperature, commonly as percent per °C. ® The following table lists the temperature dependence of the Hanna Instruments calibration buffers. HI7030...

  • Page 16: User Calibration

    • When “Out of cal. range” displayed during pH measurement, indicating the measurement range is not covered by current calibration (feature enabled in SETUP). 10.1. PROCEDURE HI3512 supports use of 7 standard buffers (1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45 pH) and up to 2 custom buffers.

  • Page 17: Five-Point Calibration

    pH Calibration 10.2. FIVE-POINT CALIBRATION • Immerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into a buffer solution and stir gently. Note: The temperature probe should be close to the pH electrode. 3 cm • Enter pH calibration. The instrument will display the measured pH, the first expected buffer and the temperature reading.

  • Page 18: Four, Three Or Two-Point Calibration

    pH Calibration  • Use the ARROW keys to configure a different buffer value. • The “ ” tag is displayed blinking until the reading is stable. • When the reading is stable and close to the selected buffer, the Confirm is displayed. •...

  • Page 19: Error Screens

    pH Calibration 10.5. ERROR SCREENS Wrong Temperature: calibration cannot be confirmed If the temperature is less than 0 °C (greater than 100 °C) during calibration, calibration cannot be confirmed. Wrong Buffer: calibration cannot be confirmed The pH reading is not close to the selected buffer. Select another buffer or change the buffer. Electrode Dirty/Broken alternatively with Buffer...

  • Page 20: Working With Custom Buffers

    pH Calibration Each time a buffer is confirmed, the new calibration parameters replace the older calibration parameters of the corresponding buffer. If an additional single buffer calibration is added subsequently, the new buffer point will be added to the stored calibration. If the existing stored calibration is full (five calibration points), after confirming the calibration point, the instrument will ask which buffer will be replaced by current buffer.

  • Page 21: Clear Calibration

    pH Calibration Press Accept to accept new value or ESC to exit adjusting mode. 10.8. CLEAR CALIBRATION Press Clear key to clear previous calibrations. The instrument displays “Calibration Cleared”. 10.9. ELECTRODE CONDITION Electrode condition icon and a numeric value (unless feature is disabled) indicate electrode status after calibration. The condition remains active until the end of the calibration day.

  • Page 22: Ph Buffer Temperature Dependence

    pH Buffer Temperature Dependence 11. pH BUFFER TEMPERATURE DEPENDENCE Temperature has an effect on pH buffers. During calibration the instrument will automatically calibrate to the pH value corresponding to the measured or set temperature. Temp pH Buffers °C °F 1.68 4.01 6.86 7.01...

  • Page 23: Relative Mv Calibration

    Relative mV Calibration 12. RELATIVE mV CALIBRATION The relative mV value calibration is used to perform a single point calibration with an ORP standard or remove the contribution of the reference electrode to display mV equivalent to a SHE. • Press CAL when the instrument is in Relative mV mode. The relative mV value and the temperature values are displayed.

  • Page 24: Ise Calibration

    For accurate calibration and to minimize cross‑contamination, use two beakers for each standard solution. One for rinsing the electrode and one for calibration. HI3512 permits a 5 point calibration in 6 standard solutions (0.1, 1, 10, 100, 1000, 10000). It is advised to bracket expected ion concentration with your standards.
  • Page 25 ISE Calibration • Use the ARROW keys to select a different standard value. • The “ ” tag is displayed blinking until the reading is stable. • When the reading is stable and close to the selected standard, Confirm key is displayed. •...

  • Page 26: Error Screens

    ISE Calibration • Press Confirm to confirm calibration. The instrument stores the calibration value and returns to normal measurement mode. Note: The instrument will automatically skip the standard solutions used during calibration. 13.3. ERROR SCREENS Wrong Standard: calibration cannot be confirmed Verify that the correct standard is selected.

  • Page 27: Ec Calibration

    SETUP). Note: TDS and Resistivity readings are derived from the EC reading and do not require calibration. 14.1. PROCEDURE HI3512 instrument supports 7 standards (0.00 µS/cm, 84.0 µS/cm, 1.413 mS/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm and 111.8 mS/cm).

  • Page 28: Error Screens

    EC Calibration  • The calibrated value and the second expected standard value are displayed. • After the first calibration point is confirmed, immerse the EC electrode into the second standard solution and stir gently. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. The instrument automatically detects the standard after few seconds the reading is stable.

  • Page 29: Nacl Calibration

    EC Calibration 14.5. NaCl CALIBRATION NaCl calibration is a one‑point procedure in 100.0% NaCl solution. Use the HI7037L calibration solution (sea water solution) as a 100% NaCl standard solution. • Select the Salinity % range and press CAL. • The measured % NaCl, the temperature and the 100% NaCl standard are displayed. •...

  • Page 30: Good Laboratory Practice (Glp)

    Good Laboratory Practice (GLP) 15. GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows storage and retrieval of data regarding electrode's status and maintenance. All data regarding pH, Rel mV, ISE, EC or Salinity calibration is stored for the user to review. Expired Calibration The “expired calibration”...
  • Page 31 Good Laboratory Practice (GLP) The instrument displays: calibration date, time, slope, calibration status, and electrode type. Last EC Calibration Data The last pH calibration data is stored automatically after a successful calibration. To view the EC calibration data, press GLP when the instrument is in the EC measurement mode. The instrument displays: calibration standards, offset, time and date, cell constant.

  • Page 32: Setup

    Setup 16. SETUP Setup mode allows viewing and modifying the measurement parameters. These are general SETUP parameters for all the ranges and range specific parameters. The following table lists the general SETUP parameters, their valid range and the factory default settings. Description Valid value Default...
  • Page 33 Setup The following table lists the specific pH/ORP/ISE range parameters. Item Description Valid value Default Number of days after Calibration Timeout Calibration warning is Disable, 1 to 7 days Disable (pH/ISE) displayed Management of 1 point First point mode (pH) Replace or offset Replace calibration...

  • Page 34: General Parameter Screens

    Setup To enter SETUP menu, press SETUP key while in measuring mode. If SETUP is not displayed press MENU key. 16.1. GENERAL PARAMETER SCREENS Backlight Select Backlight item. Press Modify. keys to change the intensity then press Accept to confirm. Press ESC to leave without changing.
  • Page 35 Setup Time Format Select Time Format item. Press function key to change the option. Date Format Select Date Format item. Press Modify. Use ARROW keys to select date format then press Accept. Press ESC to leave without changing. Language Select Language item. Use the desired function key to change the option.
  • Page 36 Setup A long acoustic signal indicates that the pressed key is not active or a wrong condition is detected while in calibration. AutoEnd Stability Select AutoEnd Stability item. Press one of the displayed function keys to select the AutoEnd stability criteria. Three options are available: Fast, Medium, Accurate.

  • Page 37: Ph Channel Range Specific Parameters

    Setup Baud Rate Select Baud Rate item. Press Modify. Use ARROW keys to select the desired communication baud. Press Accept to confirm or ESC to exit. Meter Information Select Meter Information item. Press Select. Following meter information is displayed: • firmware version •...
  • Page 38 Setup  First Point Mode Select First Point Mode item. Press the displayed function key to change the option. First point mode refers to the behavior of the instrument regarding “One point calibration”. If Offset is set, after one point calibration the instrument evaluates the offset and keeps the slopes unchanged. Custom Buffers Select Custom Buffers item.
  • Page 39 Setup Out of Calibration Range Warning Select Out of Cal. Range Warning item. Press the displayed function key to change option. If enabled, the “Out of cal. range” message is displayed if the pH reading is not within the calibration range. ISE Probe Select ISE probe item.

  • Page 40: Ec Channel Range Specific Parameters

    Setup Use ARROW keys to change the value. Press Accept to confirm or ESC to exit. If Standard was pressed. Use ARROW keys to focus on the desired electrode. Press Accept to confirm setting or ESC to exit. Press View to see probe parameters. ISE Unit Select ISE Unit item.
  • Page 41 Setup Out of Calibration Range Warning Select Out of Cal. Range Warning item. Press the corresponding functional key in order to enable/disable this feature. If enabled, a warning message is displayed when the EC reading is too far from the EC calibration points. Temperature Compensation Select T.

  • Page 42: Logging

    Logging Cell Constant Select Cell Constant item. Press Modify to change the cell constant value. Use ARROW keys to change the cell constant value. Press Accept to confirm or ESC to exit without changing. Note: If the cell constant value is modified, the EC slope calibration is deleted and the NaCl calibration is deleted. If performed, the EC offset calibration remains active.

  • Page 43: Lot Logging

    Logging If the LOG space is full, the “Log space is full” message will be displayed for few seconds when Log key is pressed. Enter View Logged Data Mode and delete records in order to free log space. 17.2. LOT LOGGING Select the desired interval in SETUP as a timed interval or AutoEnd waits for a stable value before logging.
  • Page 44 Logging Use ARROW keys to scroll between the records from the list. Press Delete All to enter Delete All screen. Press Delete to enter Delete records screen. Press More to view more information of the focused record. If More is pressed. Use ARROW keys to scroll between complete log information.

  • Page 45: Mv Calibration

    18. mV CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) All the instruments are factory calibrated for mV, EC and temperature. ® Hanna Instruments temperature probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature or ORP measurements are inaccurate, calibration should be performed.
  • Page 46 Temperature Calibration (for technical personnel only) • Immerse the temperature probe or the EC probe including temperature sensor into the vessel with ice and water as close as possible to the reference thermometer. Allow a few seconds for the probe to stabilize. •...

  • Page 47: Pc Interface

    USB socket and the other to the serial or USB port of your PC. ® Note: If you are not using Hanna Instruments HI92000 software, please see the following instructions. Sending Commands from PC It is also possible to remotely control the instrument with any terminal program.
  • Page 48 PC Interface  The instrument will answer for these commands with: <STX> <answer> <ETX> where: <STX> is 02 ASCII code character (start of text) <ETX> is 03 ASCII code character (end of text) <answer>: <ACK> is 06 ASCII code character (recognized command) <NAK>...
  • Page 49 PC Interface • 0x04 ‑ out of calibration range • 0x08 ‑ the meter is in autoend point mode • Reading status (2 chars): R ‑ in range, O ‑ over range, U ‑ under range. First character corresponds to the primary reading. Second character corresponds to the second reading (if second reading exists).
  • Page 50 PC Interface • ISE calibration data (if available) which contains: • the number of calibrated standards (1 char) • the ISE unit (2 chars) • the calibration slope, with sign and decimal point (7 chars) • the calibration time of the standard, yymmddhhmmss (12 chars) •...
  • Page 51 PC Interface Channel 1 data • Calibration Alarm time out for pH (2 chars) • Calibration Alarm timeout for ISE (2 chars) • SETUP information (2 chars): 8 bit hexadecimal encoding. • 0x01 ‑ beep ON (else OFF) • 0x02 ‑ degrees Celsius (else degrees Fahrenheit) •...
  • Page 52 PC Interface LLSxy Requests the number of lots (information about lots) on the specified channel and range (x ‑ channelnumber; y ‑ range first letter) • x=1 request for channel 1 • x=2 request for channel 2 • y=P request for pH range •...
  • Page 53 PC Interface For Channel 2 only • The TDS factor (for the TDS log only) or the salinity factor (for the Salinity log only), with sign and decimal point (6 chars) • The temperature reference value (2 chars) • The temperature compensation mode (2 chars) •...
  • Page 54 PC Interface • The calculated reading, with sign, decimal point and exponent (12 chars) • The temperature reading, with sign and decimal point (7 chars) • The reading status (1 char): R, O, U; not available for EC log • The second unit of the second reading (2 chars); it is sent only for Resistivity, TDS and Salinity log •...

  • Page 55: Temperature Correlation For Ph Sensitive Glass

    This interference is called alkaline error and ® causes the pH to be underestimated. Hanna Instruments’ glass formulations have the indicated characteristics. Sodium Ion Correction for the Glass at 20-25 °C (68-77 °F)

  • Page 56: Electrode Conditioning & Maintenance

    Electrode Conditioning & Maintenance 22. ELECTRODE CONDITIONING & MAINTENANCE * Not present in gel electrodes. Preparation Procedure • Remove the sensor protective cap. Do not be alarmed if any salt deposits are present. This is normal with pH / ORP probes and they will disappear when rinsed with water. •...

  • Page 57: Ec Probe Maintenance

    EC Probe Maintenance Measurement Rinse the pH electrode tip with distilled or deionized water. Immerse the tip 3 cm (1¾”) in the sample and stir gently for a few seconds. For a faster response and to avoid cross‑contamination of the samples, rinse the electrode tip with a few drops of the solution to be tested, before taking measurements.

  • Page 58: Troubleshooting Guide

    At startup the meter Contact your dealer at any ® displays Hanna Logo tags One of the keys is blocked. ® Hanna Instruments Service Center. permanently. Error messages are Check that buffer solution is correct Wrong or contaminated buffer, displayed during pH and fresh, and the meter is set for electrode dirty or broken.

  • Page 59: Accessories

    Accessories 25. ACCESSORIES 25.1. pH CALIBRATION SOLUTIONS HI50004-01 pH 4.01 Buffer Solution, 20 mL sachet, 10 pcs. HI50004-02 pH 4.01 Buffer Solution, 20 mL sachet, 25 pcs. HI50007-01 pH 7.01 Buffer Solution, 20 mL sachet, 10 pcs. HI50007-02 pH 7.01 Buffer Solution, 20 mL sachet, 25 pcs. HI50010-01 pH 10.01 Buffer Solution, 20 mL sachet, 10 pcs.

  • Page 60: Electrode Refill Electrolyte Solutions

    Accessories 25.4. ELECTRODE REFILL ELECTROLYTE SOLUTIONS HI7071 3.5M KCl+AgCl Electrolyte for single junction electrodes, 4x30 mL HI7072 1M KNO3 Electrolyte, 4x30 mL HI7082 3.5M KCl Electrolyte for double junction electrodes, 4x30 mL HI8071 3.5M KCl + AgCl Electrolyte in FDA approved bottle, 4x30 mL, for single junction electrodes HI8082 3.5M KCl Electrolyte in FDA approved bottle, 4x30 mL, for double junction electrodes HI8093...

  • Page 61: Ph Electrodes

    Accessories 25.8. pH ELECTRODES All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3.3') cable, as shown below: HI1043B Glass‑body, double junction, refillable, combination pH electrode. Use: strong acid/alkali. HI1053B Glass‑body, triple ceramic, conic shape, refillable, combination pH electrode. Use: emulsions. HI1083B Glass‑body, micro, Viscolene, non‑refillable, combination pH electrode.
  • Page 62 Accessories HI1230B Plastic‑body (PEI), double junction, gel‑filled, combination pH electrode. Use: general, field. HI2031B Glass‑body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products. HI1332B Plastic‑body (PEI), double junction, refillable, combination pH electrode. Use: general purpose. FC100B Plastic‑body (PVDF), double junction, refillable, combination pH electrode. Use: general purpose for food industry.

  • Page 63: Orp Electrodes

    Plastic‑body, gel‑filled, combination platinum ORP electrode. Use: general purpose. HI4430B Plastic‑body (PES), gel‑filled, combination gold ORP electrode. Use: general purpose. ® Consult the Hanna Instruments General Catalog for a complete and wide selection of electrodes. 25.10. EXTENSION CABLE FOR SCREW-TYPE ELECTRODES (Screw to BNC Adapter) HI7855/1 Extension cable 1 m (3.3') long...

  • Page 64: Other Accessories

    If the meter is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid. When shipping any meter, make sure it is properly packed for complete protection .

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